Technical data

PG 1 informs the CPU
of the variables
to be output.
PG 1 requests the
current data.
PG 1 requests the
current data.
PG 1 requests the
current data.
PG 1 requests the
current data.
First job of PG 2 is processed
Second job sent by PG 2 is processe
d
PG 2 sends the first job
PG 2 sends second job
First job of PG 2 complete
Second job of PG 2 complete
PG 1 must wait until
the CPU is free.
PG 2 must wait until
the CPU is free.
PG 1 must wait until
the CPU is free.
CPU 928B
User on PG 1
User on PG 2
Fig. 11-7 Sequence of two parallel cyclic functions
11
Parallel Operation of Two Serial PG Interfaces
CPU 928B Programming Guide
C79000-B8576-C898-01
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